Re: Fun and profit with mailq

[Viktor Dukhovni]

> On 16 Feb 2022, at 3:49 pm, Wietse Venema <wie...@porcupine.org> wrote:
> 
>> Can Postfix accept (without mangling) (with <ESC> representing
>> the underlying character) any of:
>> 
>>    Server:
>>        MAIL FROM:<"foo+\<ESC>bar"@example.com>
>>        RCPT TO:<"foo+\<ESC>bar"@example.com>
> 
> Accepted, and preserved in SMTP/LMTP or mailbox delivery, but it
> won't reach postqueue.

So presumably the envelope sender and recipient addresses in
the queue file can hold non-printable characters.

> There is a mandatory printable() filter in the bounce daemon after
> it reads a request, before it writes the bounce/defer/etc log (look
> for the VS_NEUTER macro). ESC does not count as a printable character.

Are envelope addresses censored (sanitised) by showq(8)?

-- 
        Viktor.